Strong gusts are mean. Squall line (squallline) are by a number of strong thunderstorm convection cell array composed of one narrow line of strong convective weather belt life than the average cell length thunderstorms, usually can be maintained 12 ~ 24 hours, in the horizontal spatial distribution of about 200 km.
Based on past observational data analysis, the squall line system, often there will be thunder and lightning, heavy rain, strong winds, hail, tornadoes and other severe weather phenomena, after the passage of the squall line will have a clear cold air, making the temperature suddenly dropped, and there will be significant changes in wind direction .
Icon 7, seven shares radar echo map, which line the narrow band is the strong echo squall line.
● how the formation of squall lines?
In Taiwan near the squall line occurred in the spring with the plum rainy season during the cold season, when the turn of the atmosphere in a relatively unstable, when the warm air when cold and dry air, its interface can be triggered by "squall line" the emergence of .
Most of the squall line and cold front-related activities, mainly in the ground before the cold front 100 ~ 500 km of warm areas, but sometimes in the front or rear front Front happen, sometimes, the squall line and frontal rain band itself is very difficult distinction to make.
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